Welt-shank cutter.



A. B. EXLER.

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U ISKIYI IlllYl Ankou B Eds' hun...)

Jan.v lt), lill l. Serial-Xo. 603.549. To all whom it may concern:

Be it known that. I, Ax'rox citizen of theUnited States, residing at.

make aud use the saine.

My invention relates to improvement-s in I' shoe machinery and more particularly to a machine for operating upon welts and my 'j object is in general to improve the construction and increase theclciency and utility of machines of this character.

More particularly, the invention resides in the provision of a niaclune for slitting and cutting shank lwelts., the two operations being performed simultaneously and in the further i provision of means for operating upon both inside and outside welts.

With the above and other obJects in view,

the invention consists primarily in a frame to which is secured a welt. supporting trough, a slitting knife carrier mounted to reciprocate toward and from the trough, a plurality of slitting knives carried therein and adapted to slii'the previously skived edge of the l wein-a cutting oil' knife adapted .to make a beveled cut, and means Operated by a shaft I jonrnaled transveiselyin the frame. for cansF ing the desired movement' of said knives.

The invention further consists in a certain const-ruaion,.combination and-arrangement l of parts and details as Iwrviiiafhr more fully dcscriln-d. pointed mit in 'this appended claims, and illustrated iii thiaccompanying drawings which show a preferred ciw bodiment of the iiivci'ition.

ln these drawingswhich are attached in and forni a part of this application. Figure 1 is a front elevation of the complete ma chine. Fig. i is a side elevation ot' the 'ua chine. Fig. 3 is :i pian of the sami. is an enlarged detail perspective ofa donhl faced plate cam used in operatingr the knives Fig. 5 iS :i perspective view ol' one of lhi slitting knife members. Fig. li is a detail perspective of a welt feeding trough. Fig

B. Exnsii, a

l 1S preferably 'fornite-tl- Olinda-sithief-:il liiisl'its E upper extremity provided with a longitud:- nal slot 4, the metal adjacent the slot being' extended outwardly and their recessed to 1 forni pockets 5 in which are seated tightening bolts -6 which pass through aliinng 5 1 drilled apertures 7 in the. confronting faces i of the slots, the' whole construction constitutl ing a grip device for securing the machine head. This head whichwill in general be ldesignated 8 comprises a cylindrical slot-k portion 9 adapted to be gripped in the split top of the column as described, a base frame 10 which carries the stationary portions et' i the welt operating mechanism', anda pair of standards 11 in which is journaled the-oper( ating shaft.

Referring more particularly to thehcad base. 10 it will be seen from Fig. 1 that thi` latter is provided with the two symmetrically disposed longitudinal platform pieces 1i', l'hi: sainebeing preferably cast integrally with the head. Each of these platforms serves as :i mounting for a welt. supporting and sliiting device. and since the two mechanisms are precisely alike the description of one r will-serve for both. Secured to the platform 12 by bolts, rivets or other suitable fasten i inLS are the four stationary leg members 13 f arid 13', the former reference iiunicnils applying to the two inside legs and the laitcil to the two outside legs. Each of these leg members is formed with a reduced upper extremity-14 adapted to slide Vin the bore 13 of an upper leg portion"16. and a 'set-screw 1'.' servesto secure the telescoping iiieinbeb` at any tired extension. Adjacent their upper extremities the leg portions 16 are provide-.l f with transverse slots-1S.

Fig. -i

7 is a detail section showing the clutch mech; g anism. Fig. 8 is a detail perspective vic-wg of a welt-as it-coiues from the jmachine.

Referring more. particularly to these views, in which similar reference numerals; dignate' corresponding paris throughout. l indicates in gei'ierall thehase of vthe machine., f comprising-asupporting'pillar if having an outwardly 3. The pillar, 'which asjizg thi-nigh lhc slots 1S of the leg ineinlt is the welt holder-or trough shown m detail iii Fig. 6. the said bolts co-acting with tapped openings :20 formed in the outside or vertical :ingle of the holder. {eferiing to Fig. G for the-specific construction of ihe holder, it. will he seen that the same comprises :i table portion or base 2l, the outside and forward edges of which :irc provided with upward extensions 22 and 2i respectively which forni guard walls. The hase portion l is provided adjaccutits forward cud with a plurality or' inwardly extending slots f-l, and in advance of these the V- shaped notch or aperture 25 is formed Supported in panillcl relation to the holder and spaced therefrom is the slitting knife carrier desigmatcd :is a whole by $26 and` comprisinglr a stationary guide' pieve 27 in the form of'a bar o f rectangnisir section, and secured to the .inside legs 'i3 by fasteniiigs similar indesign to those of the welt holder. Adjacent. the ends of this har are secured the laterally directed loops 28, and

vdjiistably secured by means of bolts I9 to the upper surface of the bar is bolted a relatively small casting 29 in which is i? formed the transverse guide opening 30. l

Adapted to reciprocate in the aperture 30 is the slitting knife operating bar 31 which g as shown is of rectangular section and pro- A vided on its outward end with extensions 32 in which are formed drilledapcrtures. Sccured by means of bolts 3i passing through i these apertures is a slitting knife carrier bar 35, the ends of which engage the guide loops 2S. Small helical tension springs 36 l? are secured to the inner face of the bar 35 and to the stationary member 2i", the tendene); of the springl being to normally retain f the carrier bar in the inward position.

In order to secure the slitting knives in their carrier, the latter is formed with the If parallel sided channels 3T, in the bases of whiclrare formed tapped openings. '1`he;

slitting knives, as shown in Fig. 5 comprise two portions. the knife proper the plane of whit-h is substantially vertical as here shown at 39, and the root. portion 40, the plane of which is disposed at an angle vto that of the Q hlade. Tn this root portion is formed a slot 4! by means of which the knife may be adjastahly secured for longitudinal movement in the carrier slots: 3T, a holt, 42 forming the fastening,r means. By this construction it will he seen that the knife edge shown at 43 1 may be adjusted for any dept-h of citt de- .f sii-ed. and since tbe knives are independently adjustable the `welt slits may be made of varyiiig depths in any proportion as is desired. and wear due to regrinding of the; knife edges may be conveniently taken up. Journaled in the standards 11 is the trans- "erse operating sha ft designattxl as a whole 'oy 44. Midway the length of this shaft". a

double faced plate cant 43 is keyed. l-left ring to Fig. 4 it. will be .seen that this` eau has its surfaces formed as parts ol' lit-lit' l, plaines, the helix of one .surt'a--e being ISD degrecs in advance of the other. The slitting? knife operating hais 3l are actuated fronv this cam by means of upwardly extending feet 3l which hear against the two faces of the cani and means o f the springs 31'. Additional pressure to insure positive action et' the liars. is gained hy the use of a small spring -l`| connecting the confronting terminals of the pieces 3l', and in order to more securelv brace the operatingr hars. triangular struts 4T are secured to the terminals 3l and to,

...m .run

E sleeves and operated by the connecting rod are the cut-off knife carriers to the lower ends of which are secured the knives t 56, which as shown in Fig. 1 are provided with adjusting slots 57 similar to those of the slitting knives. The eut-oil knife edges l are ground at an inclination to the axis of the knife in order to make a beveled cut as will hereinafter appear.

(lne extended end of the operating shaft. 44 is provided with a hand wheel 60 and the other end is, :is shown in Fig. 3, provided with the driving mechanism and clutch 'of which the following is a more particular description. The outer extremity of the shaft 14 is squared as shown at. 61 and on this squared extension is mounted a friction'-4 disk G2, the inner face of the disk beingi; provided with a leather wearing surface ast shown at 63 the squared portion is provided? with a reduced and threaded extremity d by means of which a securing nut G5 may hegl made to grip the disk 6i' against the shoul-i der formed at the juncture ot' the squared and cylindrical portions of the shaft." mounted upon the said eylindricalf portion and adjacent the disk is a drivii pulley 66 having a friction face 6T adapted` to Contact willi the leather surface G3 but normally held away from the same hy a helical spring GS coiled around the .shatt and bearing against the confronting iat-es of the disk and pulley. Slidably mounted upon is preferably provided with some species of annular thrust bearing not shown. The inner end of the sleeve 69 is cut at :in angle :may lle to the alti` and a stationary sleeve T0 which red to the franic journals has its' tuer extremity Ti also eut at. an angle to l'the axis the confronting ends of the stationgary and movable sleeves being disposed to A enlltjgt.. imi-vement between these confrontingr ends `\`lidably mounted for verticalv s the clutch operating yoke T1', comprising stock portion 7:2 atlapted to be secured to suitable operating rod, and an upper bilwm in mmm@ WKN-ml ln.- furcated portion T3. the forks of which congermdownwardly tn eo-aet with the con= tlronting ends of the sleeves.

The operating rod above mentioned coniprises in the present instance a tubular memher 74 threaded into thestock portion 7:! and extending downwardly parallel to the standard Il, this parallel relation being the bar extensions at 45 mi 49 mlm.t`.|`. i maintained by a guide arm T5 secured to the Relatively near the ends of the shafts :il .it is bent to form cranks 50 and on the crank pins 51 of these cranks are jouraaled connecting rods 52. Secured to the standar-ls 11 are the inwardly extending arms` fill-in the ends of which .are formed guide sleevts I 54 inclined forwardly and downwardly as ishown- Adapted to reciprocate in these i standard ll and provided at its outward extremity with a slide bearing 76. The. lower through a Tn order to normally the shaft and inside ot' the pulley is a sleeve 69, and the outward extretntt y ot this sleeve .side of the. machine produces :i welt. slitted hand shank curve, and since the cranks 50 tancons with the withdrawal stroke of the ting knife and said slitting knives.

eombinatioma frame, ineludinga welt holder,

- ting knives, a common carrier har for said knives. means for securing;r said bar for resimultaneously actuating said cutting knife,

secured to the. lever 77 and-tothe standard if il as shown. ln the operation of the machine. a shank f welt which has been previously skived as isshown in Fig. S, is placed in the welt holder, thc thin edge of the welt being directed? toward the inside. The knives being@ properly adjusted, rotation of the shaft causes the incline knife edge 5G to move' downwardly toward the aperture 25 of the welt holder base `21. The cutting: edge of the knife operates upon the welt to produceA the diagonal beveled cut, shown on the welt s end in Fig. Simultaneously the rotation ,L of the plate cam causes the knife carrier 35 to move inwardly and the knives carriedj thereby enter the slots 24, thus slitting the .7 thin edge of the welt to a predetermined depth. T he operating mechanism of oneand ent to fit the slip sole of the right hand shank curve while the operating mechanism of the other side produces a welt for a left and the faces of the plate cam (litter in phase by ISO degrees it will he seen that the operating?r stroke of one mechanism is simul- 3. In a machine of the class described, in

combination, a frame, including` a weltv f holder, a cutting knife mounted for recprocation in said frame, a plurality of slitting knivcs,a common carrier bar for said knives,

tion in said frame, a shaft journaled in said frame, a crank and a cam carried by said causing the reciprocat-ion of said cutting,r knife and means operated by said cam for causing the reciprocation of said slitting mechanism on the other side. The eiiiteh 'f which as described is of the self releasing "ariety is conveniently worked h v the foot i. of the operator through connections shown and thc hand wheel is provided in order to ed to operate upon both righi and li-l't. hand i '1. Curves, a single plate cani and crank shaft 4serving.: for both. The improved machine may be constructed in any desired size and for both manual and power operation and it will also be understood that various changesof design to conform to peisonal judgmentz and manufacturing requirements may lic made without departing from the spirit of j the invention.

What l claim is:

l. A machine of the class described. in-f cluding a welt holder, a welt cutting;` knife,l a plurality of welt slitting,r knives, and` means for siniultaneousl) aetuat ing said cut- 2. In a machine of the class described, in

:1 welt cutting.r knife mounted for reeipri'ura-' tion in said frame, :i plurality of welt slit-g ciprocation in said frame, and means for and said slitting knives.

mounted thereon a cutting knife mounted of said holders. a shaft journaled in said i frame, a pair of cranks and a cani secured to said shaft, means for connecting said cranks to each of said cuttingr knivesv rispet tivelyand means for connecting said cani with both sets of slitting knives. the cranks and cam being timed to produce simultaneoiis operations upon a welt carried in one of said holders and consecutive operations 5 on welts carried in each of said holders.

6. In a machine f t h e c l ass described, in

i (Ombinaiion. a frame, a pair ot' welt. holders mounted thereon. a rnttiir;r knife in opera-Y lzive n-laiion with eac-h oi' .said welt holders. Q'Mn fur adjusting said knives. a setof .slittiiig,r knives in operative relation with vai-h of d holder; each set comprising a plnmlityof knives umunted for independent :xdiqstment on a common carrier bar. a shaft jonrnaled in said frame. a pair of cranks 1 and :i cam secured to said shaft, means for connecting said cranks to each of said clitting knives reslwclively. and means for con neming said cam with said carrier bar, the cranks and cam being timed to produce simultaneous operations upon a welt carried in one. of said holders and consecut-ive operations on welts carried in cach of said holdters.

7. In a machine of the class described, in l 5 emnbnation, a frame, :i pair of welt holders tive relation with each of said welt holdeis,

v:slittingir knives in operative relation with means for mounting said bar for reci pi'oca! shaft, means operated by said crank for knives, a crank and a cam being timed to combination, a frame, a pair of welt holdersl for reciprocation in said frame. a set of slit ting knives in operative relation with each mounted thereon, a cuttinar knife in opera 5means for adjusting said knives, a setoty 'eich of said holder, each set comprising :1 piumini-'0f knives mounted for independent :xdjusuncn on n common carrier bar, n shaft journuled in said frzune,a pair of cranks und n double faced plate cam secured to said shaft, connceiing rods secured t0 Said cranks :1nd to encli of said cutting knives respectively, members mounted for reciprocation in said frame :uid secured to each of said carrier bars respectively, 'the confronting ends of said members being disposed in operative relation to .the faces of said cams respectively, :md :x tension spring connecting)r said confronting ends id crank and cam Ming timed to produce simultaneous openi- Lons upon a welt. carried upon one of said holders and consecutive operations on welts carried in cach of said holders.

In testimony whereof, I aix my signature, in presence of two witnesses.

ANTON B. EXLER. llitncxes:

J. F. Smmomnn, (humm: Scxmorznm. 

